ICC-ES Evaluation Report Reissued July 1, 2010 This report is subject to re-examination in two years.

Transcription

1 ICC-ES Evaluation Report ESR-1186 Reissued July 1, 2010 This report is subject to re-examination in two years. (800) (562) A Subsidiary of the International Code Council DIVISION: THERMAL AND MOISTURE PROTECTION Section: Applied Fireproofing REPORT HOLDER: W. R. GRACE & CO. CONN. CONSTRUCTION PRODUCTS DIVISION 62 WHITTEMORE AVENUE CAMBRIDGE, MASSACHUSETTS (617) EVALUATION SUBJECT: MONOKOTE MK-6, MK-6/HY, MK-6/HY EXTENDED SET (MK-6/HY ES), MK-6s AND RETRO-GUARD RG STANDARD-DENSITY CEMENTITIOUS FIREPROOFING MATERIALS; MONOKOTE Z-106, Z-106/HY AND Z-106/G MEDIUM-DENSITY CEMENTITIOUS FIREPROOFING MATERIALS; AND MONOKOTE Z-146, Z-146T, Z-156 AND Z-156-T HIGH-DENSITY CEMENTITIOUS FIREPROOFING MATERIALS 1.0 EVALUATION SCOPE Compliance with the following codes: 2006 International Building Code (IBC) 2006 International Mechanical Code (IMC) BOCA National Building Code/1999 (BNBC) 1999 Standard Building Code (SBC) 1997 Uniform Building Code (UBC) Properties evaluated: Fire resistance Physical properties Use in plenums 2.0 USES Monokote MK-6, MK-6/HY, MK-6/HY ES, MK-6s, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T and Retro-Guard RG fireproofing materials are mill-mixed cementitious materials that are machine-applied for fire-resistance-rated protection of structural steel framing members, concrete pan joists and steel floor or roof sections in all types of construction. The fireproofing materials may be used in plenums in accordance with IMC Section DESCRIPTION 3.1 General: Monokote MK-6, MK-6/HY, MK-6/HY Extended Set (MK-6/HY ES), MK-6s and Retro-Guard RG are standarddensity cementitious fireproofing materials; Monokote Z-106, Z-106/HY and Z-106/G are medium-density cementitious fireproofing materials; and Monokote Z-146, Z-146T, Z-156 and Z-156T are high-density cementitious fireproofing materials. MK-6/HY, MK-6/HY ES, MK-6s, Z-106/G and Retro- Guard RG are supplied in bags and mixed with approximately 8 gallons (30.3 L) of water per 48 pounds (21.8 kg) of material. Monokote Z-106 and Z-106/HY, are supplied in bags and mixed with approximately 8.5 gallons (32.2 L) of water per 49 pounds (22.2 kg) of material. Monokote Z-146, Z-146T, Z-156 and Z-156T are supplied in bags and mixed with approximately 4 gallons (15.1 L) of water per 49 pounds (22.2 kg) of material. MK-6/HY, MK-6/HY ES, MK-6s, Z106, Z-106/HY, Z-106/G, Z-146 and Z-146T, Z-156 and Z-156T are used for new construction. Retro-Guard RG is used for retrofit spray applications, and turns to light blue when dry. Z-146, Z-146T, Z-156 and Z-156T may be used on surfaces exposed to weather as defined in IBC Section 2502, UBC Section 224, SBC Section 202 or BNBC Section 202. The fireproofing materials have a Class A (IBC and SBC) or Class I (UBC and BNBC) flame-spread index of 25 or less and a smoke-developed index of 50 or less when tested in accordance with ASTM E 84 and UBC Standard Additives and Bonding Material: W.R. Grace & Co. Spatterkote SK-3 is a mill-mixed cementitious material applied to galvanized or painted steel floor or roof metal decks, as specified in Tables 2 through 9 of this report. W.R. Grace & Co. Monokote Accelerator may be added to MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106/HY and Z-106/G to a maximum percentage of 5 percent by weight, as a field-application aid. Firebond Concentrate is manufactured by Fiberlock Technologies, Inc., and is a bonding agent used when applying Monokote Z-106/HY, injected with Monokote Accelerator, to bare structural steel shapes or when applying fireproofing materials to wide-flange structural steel shapes having an unknown primed or painted surface in accordance with Section 4.5 of this report. ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as to any finding or other matter in this report, or as to any product covered by the report. Copyright 2010 Page 1 of 13

2 ESR-1186 Most Widely Accepted and Trusted Page 2 of INSTALLATION 4.1 General: Installation of cementitious fireproofing materials Monokote MK-6, MK-6/HY, MK-6/HY Extended Set (MK-6/HY ES), MK-6s, Retro-Guard RG, Monokote Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156 and Z-156T must comply with this report and the manufacturer's published installation instructions. The manufacturer s published installation instructions must be available at the jobsite during installation. The materials are mixed in a plaster mixer and then machine-applied through a nozzle, with air pressure and volume adjusted to provide the proper spray pattern. Application is achieved by applying one or more coats, and patching may be done by hand. The required in-place density for the fireproofing materials is shown in Table 1 of this report. In-place density must be verified by the method prescribed in ASTM E 605 (IBC) or BNBC Section , SBC Section or UBC Standard 7-6 (UBC). The materials must be applied to the thickness specified in Tables 2 through 9 of this report, as applicable. These materials have setting characteristics and must be applied promptly after mixing. Mixing must use clean equipment. 4.2 Steel Surface Condition: Steel surfaces that are to be protected must be free from substances that may prevent adhesion. When Firebond Concentrate is used as described in Section 3.2 of this report, the material must be applied at a nominal rate of 500 square feet per gallon (12.2 m 2 /L) when diluted 1:1 with water, or at a nominal 1000 square feet per gallon (24.4 m 2 /L) when applied at full strength. 4.3 Application to Galvanized Steel Floor and Roof Units: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY and Z-106/G may be sprayed directly onto galvanized steel fluted floor units. When applying MK-6/HY, MK-6/HY ES, MK-6s, RG and Z-106/G, all roof units without concrete topping, all cellular (flat) portions of galvanized metal decks and all bottomless trench headers must first be coated with an application of Spatterkote SK-3. Spatterkote SK-3 must be applied in accordance with the manufacturer s published Installation instructions. The SK-3 application must result in an evenly distributed spattered surface, leaving 10 to 30 percent of all deck surface exposed. Overspray onto other surfaces to be fireproofed is allowed, but is not required. The SK-3 thickness constitutes part of the fireproofing thickness. When applying Z-106 or Z-106/HY, all cellular (flat) portions of galvanized metal decks must be lathed with 2.5-pound-per-square-yard (1.4 kg/m 2 ), diamond-mesh, -inch (9.5 mm), expanded metal lath, complying with ASTM C 847. When applying Z-146, Z-146T, Z-156 and Z-156T, all cellular and fluted portions of galvanized metal decks must be lathed with 2.5-pound-per-square-yard (1.4 kg/m 2 ), diamond-mesh, -inch (9.5 mm), thick expanded metal lath, complying with ASTM C 847. Electrical trench headers require the use of steel studs and disks when protected with cementitious fireproofing materials. 4.4 Application to Bare Structural Steel Shapes: MK-6/HY, MK-6/HY ES, MK-6s, Retro Guard RG, Z-106, Z-106/G, Z-146, Z-146T, Z-156 and Z-156T may be sprayed directly onto bare structural steel shapes. Z-106/HY injected with Monokote Accelerator must be applied only after application of Firebond Concentrate IBC: In jurisdictions adopting the IBC, structural steel members such as exposed beams, columns and ceilings less than 5 feet (1524 mm) above the floor, landing, or occupied space, and columns or vertical members must be protected with Monokote Z-146, Z-146T, Z-156 or Z-156T at the required thickness, or the exposed material must be protected with corner guards, a substantial jacket of metal or other noncombustible material in accordance with IBC Section to a height adequate to provide full protection, but not less than 5 feet (1524 mm) BNBC, SBC and UBC: In jurisdictions adopting the BNBC, SBC or the UBC, structural steel members such as exposed beams, columns and ceilings less than 8 feet (2438 mm) above the floor, landing, or occupied space, and columns or vertical members to a height of 8 feet (2438 mm), must be protected with Monokote Z-146, Z-146T, Z-156 or Z-156T at the required thickness, or the exposed material must be protected with either furred wallboard, concrete or cement plaster with lath. 4.5 Application to Primed or Painted Structural Steel Shapes: Any steel members exceeding the maximum dimensional values in condition 1, 2, or 3 of Section of this report, require a mechanical break, consisting of one or more minimum 1.7-pound-per-square-yard (0.65 kg/m2) metal lath strips, or No. 20 SWG galvanized hexagonal wire mesh mechanically fastened to the flange or web either by welding, screws or power-actuated fasteners. Fasteners must be spaced a maximum of 12 inches (305 mm) on center, on each longitudinal edge of the strip, so that the clear spans do not exceed the limits established in condition 1, 2 or 3. At least 25 percent of the width of the oversize flange or web element must be covered by the metal lath. Minimum metal lath width must be 3 inches (89 mm) Under the following conditions, MK-6/HY, MK-6/HY ES, MK-6s, Retro Guard RG, Z-106, Z-106/HY Z-106/G, Z-146, Z-146T, Z-156 and Z-156T may be applied to wideflange structural steel shapes having an unknown primed or painted surface: 1. Beam flange width must not exceed 12 inches (305 mm). 2. Column flange width must not exceed 16 inches (406 mm). 3. Beam or column web depth must not exceed 16 inches (406 mm). 4. Bond tests of five specimens in accordance with ASTM E 736 verify the bond strength of the fireproofing material bonded to a painted or primed 1 / 8-inch-thick (3.2 mm) steel substrate. Firebond Concentrate specified in Section 3.2 of this report must be used for structural steel shapes with unknown primed or painted surfaces Monokote MK-6/HY, MK-6/HY ES, MK-6s, Z-106, Z-106/HY, Z-146, Z-146T, Z-156, Z-156T and Retro-Guard RG may be applied directly to painted or primed joists or joist girders without the use of mechanical breaks. 4.6 Thickness: The thickness tolerances for fireproofing materials must comply with Sections and of this report Minus Tolerance: The thickness must be corrected by applying additional material where the calculated

3 ESR-1186 Most Widely Accepted and Trusted Page 3 of 13 average thickness is less than that required by the recognized design, or where an individual measured thickness reading has a minus tolerance greater than 1 / 4 inch (6.4 mm), or more than 25 percent for a design thickness of less than 1 inch (25.4 mm) Positive Tolerance: An individual measured thickness that exceeds the thickness specified in a design by 1 / 4 inch (6.4 mm) or more must be recorded as the thickness specified in the design plus 1 / 4 inch (6.4 mm). 4.7 Special Inspections: Special inspections shall be provided in accordance with IBC Section , BNBC Section , SBC Section 1709 and UBC Section , as applicable. 5.0 CONDITIONS OF USE The Monokote MK-6, MK-6/HY, MK-6/HY Extended Set (MK-6/HY ES), MK-6S and Retro-Guard RG standarddensity cementitious fireproofing materials; Monokote Z-106, Z-106/HY and Z-106/G medium-density cementitious fireproofing materials; and Monokote Z-146, Z-146T, Z-156 and Z-156T high-density cementitious fireproofing material described in this report comply with, or are suitable alternates to what is specified in, those codes listed in Section 1.0 of this report, subject to the following conditions: 5.1 Installation must comply with this report, the manufacturer s published installation instructions and the applicable code. In the event of a conflict between the manufacturer s published installation instructions and this report, this report governs. 5.2 The average bond strength must be a minimum of 20 times the weight of the in-place fireproofing material but not less than 150 psf (732 kg/m 2 ); or, for primed steel, the average bond strength must be a minimum of 80 percent, with a minimum individual bond strength of 50 percent of the bond strength of fireproofing material applied to clean, bare, 1 / 8-inchthick (3.2 mm) steel plate, whichever is greater. Where bond strength values are less than these minimums, Firebond Concentrate specified in Section 3.2 of this report must be applied to the primed or painted surfaces, and the bond strength tests must be repeated. 5.3 Measuring methods in ASTM E 605, ASTM E 736, IBC Section , BNBC Section , SBC Section and UBC Standard 7-6 (UBC) must be used to verify thickness, density and bond strength of the fireproofing materials. When thicknesses are averaged and reported as a single measurement, each thickness measurement before averaging must be the thickness listed in this report plus or minus 1 / 4 inch (6.4 mm), for averaging purposes only. 5.4 Special inspection performed by a qualified person approved by the code official is required as set forth in IBC Section or UBC Section EVIDENCE SUBMITTED Data in accordance with the ICC-ES Acceptance Criteria for Spray-applied and Intumescent Mastic Coating Fireprotection Materials (AC23), dated June 2004, (editorially revised March 2008). 7.0 IDENTIFICATION The fireproofing materials described in this report must be identified by a stamp on the bag bearing the manufacturer s name (W.R. Grace & Co.-CONN.), the product type and the evaluation report number (ESR-1186).

4 ESR-1186 Most Widely Accepted and Trusted Page 4 of 13 TABLE 1 IN-PLACE DRY DENSITY REQUIRED FOR FIREPROOFING MATERIALS MATERIAL DESIGNATION IN-PLACE DENSITY (pcf) Minimum Average Individual Density MK-6/HY, MK-6/HY ES and RG MK-6s Z-106, Z-106/HY and Z-106/G Z-146 and Z-146T Z-156 and Z-156T For SI: 1 pcf = kg/m 3. TABLE 2 MINIMUM AVERAGE THICKNESS OF FIRE PROTECTION MATERIALS APPLIED TO STEEL COLUMNS 1 A. Wide flange steel columns: Minimum thickness (inches) 2 A1. For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106/G MINIMUM W/D RATIO 4 HR. 3 HR. 2 HR. 1 HR / 3 8 / 3 8 / 3 8 / / / / 8 A2. For fire protection materials: Z-106, Z-106HY MINIMUM W/D RATIO 4 HR. 3 HR. 2 HR. 1 HR / 3 8 / 1 8 / 1 4 / / / / 8 A3. For fire protection materials: Z-146, Z-146T, Z-156, and Z-156T MINIMUM W/D RATIO 4 HR. 3 HR. 2 HR. 1 HR / 3 8 / 3 8 / 3 8 / / / / / / 8 B. Hollow shape steel columns: Minimum thickness (inches) 3 B1. For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G STEEL TUBE: SIZE (inches) A/P RATIO 4 HR. 3 HR. 2 HR. 1 HR / NR / / 4 1 / 3 2 / 1 8 / 1 4 / 4 STEEL PIPE SIZE (inches) A/P RATIO 4 HR. 3 HR. 2 HR. 1 HR. 3 dia Standard 0.20 NR 3 1 / / dia Double Extra Strong dia Standard / / 4 10 dia. 0.5 Extra Strong

5 ESR-1186 Most Widely Accepted and Trusted Page 5 of 13 TABLE 2 (Continued) B2. Hollow shape steel columns: Minimum thickness (inches) 4 For fire protection materials: Z-146, Z-146T, Z-156, and Z-156T STEEL TUBE: SIZE (inches) A/P RATIO 4 HR. 3 HR. 2 HR. 1 HR / ¾ / 5 8 / 1 8 / 4 1 / 3 2 / 1 8 / 1 4 / 4 STEEL PIPE SIZE (inches) A/P RATIO 4 HR. 3 HR. 2 HR. 1 HR. 4 dia Standard dia Double Extra Strong / 4 ¼ 8 dia Standard / 8 1 NR = Not recognized 10 dia. 0.5 Extra Strong Fire-resistive protection is applied directly to exposed column contour or column boxed with metal lath. 2 As an alternate to Table 2A, thickness of fireproofing may be determined on the basis of the following equation: h = R/[1.05(W/D) ] R = Fire resistance (hours). H = Thickness of fireproofing, ranging from 0.25 to inches. D = Heated perimeter of steel column (inches). W = Weight of steel column (lbs. per lineal foot). Limitations: W/D ratio ranges from a minimum of 0.33 to a maximum of Minimum thickness is 1 / 4 inch. 3 As an alternate to Table 2B1, thickness of fireproofing, may be determined on the basis of the following equation: T = (R )/[265.75(A/P)] R = Fire resistance (minutes). A = Cross-sectional area (square inches). P = Heated perimeter (inches). T = Thickness of fireproofing, ranging from to inches. A/P equation for tube columns = t(a + B - 2t)/(A + B). A/P equation for pipe columns = t(d - t)/d. T = Wall thickness of column. A = Length of horizontal side (inches). B = Length of vertical side (inches). D = Diameter of pipe (inches). Limitations: A/P ratio ranges from a minimum of 0.18 to a maximum of 2. Thickness is between 1 / 4 inch and 3 inches. 4 As an alternate to Table 2B2, thickness of fireproofing, may be determined on the basis of the following equation: T = (R - 0.2)/[4.43(A/P)] R = Fire resistance (hours). A = Cross-sectional area (square inches). P = Heated perimeter (inches). T = Thickness of fireproofing ranging from to inches. A/P equation for tube columns = t(a + B - 2t)/(A + B). A/P equation for pipe columns = t(d - t)/d. T = Wall thickness of column. A = Length of horizontal side (inches). B = Length of vertical side (inches). D = Diameter of pipe (inches). Limitations: A/P ratio ranges from a minimum of 0.18 to a maximum of 2. Thickness is between 1 / 4 inch and 3 inches.

6 ESR-1186 Most Widely Accepted and Trusted Page 6 of 13 TABLE 3 MINIMUM AVERAGE THICKNESS OF FIRE PROTECTION MATERIALS APPLIED TO PROTECTED FLOOR ASSEMBLIES Assembly: Steel beams or joists supporting minimum 1 -inch-deep steel decking with minimum 2 inch-thick concrete slab over top of flutes. a. Metal thickness minimum gage: fluted 22 MSG, cellular 20/20MSG b. Normal-weight or lightweight concrete 1 For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T Fireproofing Thickness On Metal Deck (Inches) 4 HR PARAMETER 1 HR 2 HR 3 HR Lightweight Concrete Normal-weight Concrete Crest 1 1 Valley / 8 Cellular NR NR Assembly: Steel beams or joists supporting minimum 2-inch-deep steel decking with minimum 2-inch-thick concrete slab over top of flute. a. Metal thickness minimum gage: fluted 22 MSG, cellular 20/18MSG b. Normal-weight or lightweight concrete. 1 c. Note: Spatterkote SK-3 is required on cellular decking for MK-6/HY ES, MK-6s, Z-106 and RG. Lath is required on cellular decking for Z-106, Z-106/HY and Z-106/G. For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z156T Fireproofing Thickness On Metal Deck (Inches) PARAMETER 1 HR 2 HR 3 HR 4 HR Normal-weight Concrete 1 1 / 4 NR LIGHTWEIGHT CONCRETE 1 1 NR 2, 3 and 4 TRENCH HEADERS BOTTOMLESS TRENCH HEADER: MAX. 36 INCHES WIDE 1 HR 2 HR 3 HR 4 HR Crest 1 1 / / 4 NR Valley / 8 NR Cellular / 8 NR TRENCH HEADER WITH BOTTOM PAN: MAX. 36 INCHES WIDE 1 HR 2 HR 3 HR 4 HR Crest 1 1 / / / 4 NR Valley 1 1 / / / 8 NR Cellular 1 1 / / / 8 NR TRENCH HEADER WITH INTERMITTENT BOTTOM PAN: MAX. 36 INCHES WIDE 1 HR 2 HR 3 HR 4 HR Crest 1 2 NR NR Valley 1 1 NR NR Cellular 1 1 NR NR ELECTRICAL INSERTS 5 Insert where concrete is not removed from deck valleys and insert top 6 and 7 1 HR 2 HR 3 HR 4 HR Normal-weight concrete slab NR Lightweight concrete slab 1 1 / 8 NR Inserts which penetrate sides of deck cells, and there is no concrete in valleys between cells under insert 7 1 HR 2 HR 3 HR 4 HR Preset: Dual Service Normal-weight concrete slab 1 1 / 4 NR Lightweight concrete slab 1 NR Preset: Triple Service Normal-weight concrete slab 1 1 / 4 NR Lightweight concrete slab 1 NR Inserts contain internal modifications and penetrate sides of deck cells where no concrete is in valleys under insert 7 1 HR 2 HR 3 HR 4 HR Normal-weight concrete slab Lightweight concrete slab Normal-weight concrete slab Lightweight concrete slab Preset: Dual Service Preset: Triple Service NR NR NR NR NR NR

7 ESR-1186 Most Widely Accepted and Trusted Page 7 of 13 TABLE 3 (Continued) Inserts which penetrate top of deck cells, and there is no concrete in valleys between cells under insert 8 1 HR 2 HR 3 HR 4 HR Normal-weight or lightweight concrete slab Normal-weight or lightweight concrete slab Preset: Triple Service; aluminum plate placed on top of insert Preset: Triple Service; zinc plate placed on top, sides or bottom of insert For SI: 1 inch = 25.4 mm; 1 psi = 6.89 kpa; 1 ft = mm; 1 ft 2 = m2; 1 pcf = kg/m 3. NR = Not recognized NR NR 1 NR Notes: 1 Normal-weight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 148 pcf, and utilizes either carbonate or siliceous aggregates. Lightweight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 110 pcf. Concrete must encapsulate 6 6 W1.4 W1.4 welded wire fabric. 2 Fireproofing thickness under bottomless and intermittent trench headers must extend 4 inches beyond each side of trench header. Fireproofing thickness under trench headers with bottom pans must extend 5 inches beyond each side of trench header. Allowable loads must be based on non-composite design. 3 The cellular (flat plate) portion of units under trench headers must have welded Nelson steel studs and No. 12 SWG galvanized wire, attached to a 13 / 16-inch-diameter No. 28 MSG galvanized steel disc. Studs must be in rows parallel to the trench. Studs must average at least one stud per 236 sq. in. of cellular floor units beneath the trench, a maximum of 4 inches from edge of trench header with a maximum of 22 inches between rows and 24 inches between studs. For three-hour protection, the stud length must be 2 1 / 8 inches. For two-hour protection, the stud length must be 1 inches. 4 Intermittent bottom trench header consists of a horizontal closure plate (minimum 22 MSG) over the fluted deck section, which is affixed to floor units by welds or screws. Fireproofing thickness for 24-inch-wide intermittent bottom trench headers is 1 1 / 8 inches for a two-hour rating. 5 Fireproofing thickness for all inserts must be sprayed to the entire width and length of cellular units between supports and must extend beyond the edges a distance of 12 inches. 6 Spacing for un-used condition must not be more than one insert for each 6 sq. ft. of floor area, with not less than 30 inches between inserts along the deck unit and 18 inches in the transverse direction. Active inserts cannot exceed more than one in each 12 sq. ft. Un-used inserts must be packed with mineral wool or covered with concrete. 7 Spacing must not be more than one insert in each 7 sq. ft. of floor area, with not less than 25 inches between edges of adjacent inserts or must not be more than one inset in each 8 sq. ft. of floor area, with not less than 2 feet center-to-center of adjacent inserts. 8 Spacing must not be more than one insert in each 8 sq. ft. of floor area, with not less than 2 feet center-to-center of adjacent inserts.

8 ESR-1186 Most Widely Accepted and Trusted Page 8 of 13 TABLE 4A FLOOR BEAMS (W8X28) SUPPORTING A NORMAL-WEIGHT OR LIGHTWEIGHT CONCRETE SLAB OR FLUTED FORM UNITS WITH NORMAL-WEIGHT OR LIGHTWEIGHT CONCRETE TOPPING APPLIED TO UNPROTECTED FLOOR ASSEMBLIES 1 AND 2 For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T Minimum unrestrained fireproofing thickness (inches) Rating (HR) 1 FLUTED DECK ONLY FLUTED OR CELLULAR DECK Normal Weight Concrete Lightweight Concrete Normal Weight Concrete Lightweight Concrete / 3 8 / 7 4 / 7 8 / / / TABLE 4B FLOOR BEAMS (W8X28) SUPPORTING A NORMAL-WEIGHT OR LIGHTWEIGHT CONCRETE SLAB OR FLUTED FORM UNITS WITH NORMAL-WEIGHT OR LIGHTWEIGHT CONCRETE TOPPING APPLIED TO PROTECTED FLOOR ASSEMBLIES 1 AND 2 For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T Minimum unrestrained fireproofing thickness (inches) FLUTED DECK ONLY FLUTED OR CELLULAR DECK Rating (HR) Normal Weight Concrete Lightweight Concrete Normal Weight Concrete Lightweight Concrete / / For SI: 1 inch = 25.4 mm; 1 psi = 6.89 kpa; 1 pcf = kg/m 3. Notes: 1 Normal-weight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 148 pcf, and utilizes either carbonate or siliceous aggregates. Lightweight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 110 pcf. Concrete must encapsulate 6 6 W1.4 W1.4 welded wire fabric. 2 As an alternate to beam thicknesses in Tables 4A and 4B, thickness for unrestrained beams may be determined on the basis of the following equation: T = Thickness of fireproofing (inches). W = Weight of steel beam (pounds per lineal foot). D = Heated perimeter of steel beam (inches). 1 = Refers to desired beam size and required material thickness. 2 = Refers to W8 28 beam size and appropriate material thickness in Tables 4A and 4B. Limitations: Minimum thickness must not be less than inch. W/D ratios must not be less than 0.37.

9 ESR-1186 Most Widely Accepted and Trusted Page 9 of 13 TABLE 5 FLOOR JOISTS SUPPORTING MIXED CELLULAR/FLUTED DECKING WITH NORMAL-WEIGHT CONCRETE SLAB OR WITH SOLID CONCRETE SLAB APPLIED TO PROTECTED OR UNPROTECTED FLOOR ASSEMBLIES For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T Minimum unrestrained fireproofing thickness (inches) Joist and bridging with or without lath, scrim or net 4 and 5 30 ksi 30 ksi 1, 2, 3, Spacing 1 HR 2 HR 3 HR 4 HR More than 4 ft. O.C. Equal to or less than 4 ft. O.C. 2 1 / 4 3 NR 1 2 NR Top and bottom chords consist of two angles with a minimum total area of 0.96 and 0.77 sq. in., respectively. Web members are either round bars or angles. Minimum area for the end NA 1 1 / / diagonal web is sq. in. Minimum area for the first six interior diagonal webs is sq. in. All other interior webs have a minimum area of sq. in. Top and bottom chords consist of two angles with a minimum total area of 1.74 sq. in. First five web members are round bars or angles, sq. in. All other interior webs have a minimum area of sq. in. NA 1 1 / / For SI: 1 inch = 25.4 mm; 1 in 2 = 645 mm 2 ; 1 psi = 6.89 kpa; 1 ft = mm; 1 psi = 6.89 kpa; 1 lb/sq. yd. = 0.38 kg/m 2 ; 1 pcf = kg/m 3 ; 1 ksi = kpa. NA = Not applicable NR = Not recognized Notes: 1 Normal-weight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 148 pcf, and utilizes either carbonate or siliceous aggregates. Lightweight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 110 pcf. Concrete must encapsulate 6 6 W1.4 W1.4 welded wire fabric. 2 Fire-resistive protection is applied directly to exposed beam contour or boxed with expanded metal lath. 3 Fireproofing must be applied to joist following joist contour. 1.7 to 3.4-lb./sq. yd. diamond mesh inch expanded steel lath or 3 / 32 inch to 3 / 16 inch fiberglass scrim fabric or 20 mil strand 3/16 inch plastic net secured to one side of each steel joist is optional. If metal lath is used, lath is to be fully covered, with no minimum thickness requirement. If fiberglass mesh is used, mesh is not required to be fully covered. 4 Thickness of fireproofing must be 1 inches up to 2 hour rating for minimum 16K2 joists with minimum -inch-diameter web members or for LH joists. 5 Minimum 5 pcf or less density polystyrene can be used over the deck without affecting the deck or beam protection thicknesses. When other rigid thermal insulations or more than 5 pcf polystyrene is used over the deck, the deck and beam protection thickness must be increased to the next hourly rating using interpolation. As an alternative for floor beam thickness, roof beam thickness can be substituted using the thickness for the same hourly rating. TABLE 6 CONCRETE PAN JOISTS, POURED-IN-PLACE WITH NORMAL-WEIGHT CONCRETE SLAB AT A MINIMUM TOTAL 2 INCH THICKNESS, A MAXIMUM 30 INCH SPAN BETWEEN JOISTS AND A MINIMUM INCH CONCRETE COVER FOR JOIST REINFORCEMENT 1 For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T Minimum unrestrained fireproofing thickness (inches) Parameter 1 HR 2 HR 3 HR 4 HR Slab Soffit NR NR For SI: 1 inch = 25.4 mm; 1 psi = 6.89 kpa; 1 pcf = kg/m 3. NR = Not recognized Note: 1 Normal-weight concrete has a minimum compressive strength of 3,000 psi and a minimum unit weight of 148 pcf, and utilizes either carbonate or siliceous aggregates.

10 ESR-1186 Most Widely Accepted and Trusted Page 10 of 13 TABLE 7 MINIMUM AVERAGE THICKNESS OF FIRE PROTECTION MATERIALS APPLIED TO STEEL TRUSSES FOR FIRE PROTECTION MATERIALS MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, 1, 2, 3, 4 AND 5 Z-106/HY, Z-106/G, Z-146, Z-146T, Z-157, Z-156T (inches) The thickness of fire protection materials applied to structural steel trusses is determined in accordance with UBC Standard 7-7, Part I, as follows: Step 1: Determine the W/D ratio for each individual element of the truss. W/D ratios are defined as the weight per lineal foot (W) of the element in pounds divided by the heated perimeter (D) of the element (sides directly exposed to heat in a fire) in lineal inches. The weight-toheated perimeter (W/D ratio) of truss elements which directly support floor or roof constructions, i.e., top chords, must be determined on the same basis as for beams and girders. The method to calculate the heated perimeter (D) of the top chord is illustrated in the left hand figure below. The weight-to-heated perimeter ratio (W/D ratio) of truss elements which can be simultaneously exposed to fire on all sides, i.e., webs and bottom chords must be determined on the same basis as columns. The method to calculate the heated perimeter of the web and bottom chord is illustrated in the right hand figure below. For different shapes not illustrated in the figures below, the same general methodology applies. Step 2: Substitute the W/D ratio for each individual element of the truss into the formula below to determine the thickness of protection required (inches): t = R/[63(W/D) + 37] t = Thickness of fireproofing protection (inches). R = Fire resistance (minutes). W = Weight of steel, lbs./lin. ft. D = Heated perimeter of each truss element (inches) 3 Notes: 1 Where truss construction includes tube or pipe steel elements, the thickness of protection for the tube or pipe steel must be taken from Table 2, of this report. 2 Methodology presented in this table is limited to unrestrained conditions. 3 As an alternate to the formula, thickness may be taken from Table 2 columns using the appropriate minimum W/D ratio. 4 Minimum chord or web member size has W/D ratio = Other steel shapes with W/D ratios greater than 0.33 may be used. 5 Top flange of the top chord supports concrete slab or steel deck units. TABLE 8 MINIMUM AVERAGE THICKNESS OF FIRE PROTECTION MATERIALS APPLIED TO PROTECTED ROOF ASSEMBLIES FOR FIRE PROTECTION MATERIALS MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G, Z-146 (inches) 1,*,+ A. Roof assembly with polyisocyanurate insulation board or mineral and fiber and fiberglass insulation boards. 1. Structural support: Steel beams or joists supporting minimum 1 inch fluted steel decking, minimum No. 22 MSG gage. 2. Gypsum board: Five-eighths-inch-thick gypsum board fastened or adhered to metal roof deck under insulation board. 3. Insulation type: a. Polyisocyanurate insulation boards: Minimum 2 inches thick with gypsum board, minimum 3 inches thick without gypsum board; or b. Mineral and fiber board: Minimum thickness 1 inch. Minimum thickness 2 inches when Item 4b or Item 4c is used; or c. Fiberglass insulation board: Minimum thickness inch for one hour and 1 inches for two hours. Minimum 1 inches when Item 4b or Item 4c is used. d. Polystyrene foamed plastic insulation boards: Minimum thickness 1 inch, maximum thickness 8 inches, and maximum density 2.5 pcf. Insulation boards must be used with -inch-thick gypsum board fastened or adhered to metal roof deck under insulation board. 4. Roof covering: a. Hot-mopped or cold-applied Class A, B, or C roof covering. b. Ballasted, adhered or mechanically attached single-ply roof covering. c. Metal roof deck panels in addition to or in lieu of Items 4a and 4b.

11 ESR-1186 Most Widely Accepted and Trusted Page 11 of 13 TABLE 8 (Continued) FIRE PROTECTION MATERIAL THICKNESS FOR UNRESTRAINED RATINGS (inches) PARAMETER 3 HR. 2 HR. 1 HR. Deck without gypsum board Deck with gypsum board / 8 For SI: 1 inch = 25.4 mm; 1 pcf = kg/m 3. B. Assembly: Extruded polystyrene foamed plastic roof insulation boards. 1. Structural support: Steel beams or joists supporting minimum 1 inch fluted steel decking, minimum No. 22 MSG gage. 2. Gypsum board: Five-eighths-inch-thick gypsum board fastened or adhered to metal roof deck under insulation board. 3. Insulation: Extruded polystyrene, minimum thickness 1 inch, maximum thickness 8 inches, and maximum density 2.5 pcf insulation boards. 4. Roof covering: a. Hot-mopped or cold-applied Class A, B or C roof covering. b. Ballasted, adhered or mechanically attached single-ply roof covering. FIRE PROTECTION MATERIAL THICKNESS FOR UNRESTRAINED RATINGS (inches) PARAMETER 3 HR. 2 HR. 1 HR. Deck with gypsum board NR 1 C. Roof assembly with polyurethane foam plastic roof insulation: 1. Structural support: Steel beams or joists supporting minimum 1 -inch-deep fluted steel decking, minimum No. 22 MSG gage. 2. Gypsum board: Five-eighths-inch-thick gypsum board fastened or adhered to metal deck under insulation. 3. Insulation type: Polyurethane foamed plastic formed by the simultaneous spraying of two liquid components applied over the gypsum board at a nominal thickness of 1 to 5 inches. FIRE PROTECTION MATERIAL THICKNESS FOR UNRESTRAINED RATINGS (inches) PARAMETER 3 HR. 2 HR. 1 HR. Deck with gypsum board / 8 1 D. Roof assembly with no minimum insulation thickness: 1. Structural support: Steel beams or joists supporting minimum 1 inch fluted steel decking, minimum No. 22 MSG gage. 2. Gypsum board: Five-eighths-inch-thick gypsum board fastened or adhered to metal roof deck under insulation board. 3. Insulation: No minimum insulation thicknesses with or without gypsum board. 4. Roof covering: a. Hot-mopped or cold-applied Class A, B, or C roof covering. b. Ballasted, adhered or mechanically attached single-ply roof covering. c. Metal roof deck panels in addition to or in lieu of Items 4a and 4b. FIRE PROTECTION MATERIAL THICKNESS FOR UNRESTRAINED RATINGS (inches) For fire protection materials: MK-6/HY, MK-6s, MK-6/HY, ES, RG, Z-106, Z-106/HY, Z-106/G PARAMETER 3 HR. 2 HR. 1 HR. Deck without gypsum board Deck with gypsum board 1 1 E. Roof assembly with no minimum insulation thickness: 1. Structural support: Steel beams or joists supporting minimum 1 inch fluted steel decking, minimum No. 22 MSG gage. 2. Gypsum board: Five-eighths-inch-thick gypsum board fastened or adhered to metal roof deck under insulation board. 3. Insulation: No minimum insulation thicknesses with or without gypsum board. 4. Roof covering: a. Hot-mopped or cold-applied Class A, B, or C roof covering. b. Ballasted, adhered or mechanically attached single-ply roof covering. c. Metal roof deck panels in addition to or in lieu of Items 4a and 4b. FIRE PROTECTION MATERIAL THICKNESS FOR UNRESTRAINED RATINGS (inches) For fire protection material: Z-146 PARAMETER 3 HR. 2 HR. 1 HR. Deck without gypsum board Deck with gypsum board 3 2 1

12 ESR-1186 Most Widely Accepted and Trusted Page 12 of 13 TABLE 8 (Continued) (F) FIRE PROTECTION MATERIAL THICKNESS FOR WIDE FLANGE MEMBER PROTECTION (inches) 2 AND 5 BEAMS MINIMUM W/D RATIO 3 HR. 2 HR. 1 HR. Min. W Min. W Min. W [1 ] 1 [1 ] 2 [2 ] [1 1 / 8] 1 [1 1 / 4] 1 [1 ] (G) FIRE PROTECTION MATERIAL THICKNESS FOR STEEL JOIST PROTECTION (inches) 4 SIZE AND SPACING OF STEEL JOISTS 3 HR. 2 HR. 1 HR. 10K1 with or without scrim or lath spaced > 4 ft. o.c. 3 1 / / / 8 10K1 with or without scrim or lath spaced 4 ft. o.c K3 24 ksi max or 16K2 30 ksi max. joists with or without scrim > 4 ft o.c. 2 1 / K3 24 ksi max or 16K2 30 ksi max. joists with or without scrim 4 ft. o.c. 2 1 / For SI: 1 inch = 25.4 mm; 1 lb/sq. yd. =0.38 kg/m 2. *Spatterkote SK3 required on roof decking for MK-6/HY, MK-6/HY ES, MK-6s, Z-106/G, and RG. Firebond Concentrate is required on roof decking for Z-106/HY. Lath is required on rood decking with Z Increase thickness by 1 / 16 inch for Z-106/HY to the nearest 1 / 8 inch. 1 Insulation and roof covering and method of securement must be classified by Underwriters Laboratories Inc. and be recognized in a current ICC-ES evaluation report. Where foam plastic insulation is used, it must be recognized in the roof covering ICC-ES evaluation report. NR = Not recognized. 2 As an alternate to the roof beam thickness provided in Table 8-F, thicknesses for unrestrained beams may be determined by the following equation: [( W 2/ D2) + 0.6] T2 T1= [( W1/ D1) + 0.6] + [ ] [ ] [ ] T = Thickness of fireproofing. W = Weight of steel beam (pounds per lineal foot). D = Heated perimeter of steel beam (inches). 1 = Refers to desired beam size and required material thickness. 2 = Refers to given beam size and material thickness in table. Limitations: Minimum thickness must not be less than inch. W/D ratios must not be less than to 3.4 lb. /sq. yd. diamond mesh, inch metal lath, 3 / 32 to 3 / 16 inch fiberglass scrim fabric, or 20 mil strand 3 / 16 inch plastic net, secured to one side of each steel joist, is optimal. 4 Bridging bars or angles must be protected with the coating material thickness required for a minimum distance of 12 inches beyond the joist. 5 The number in brackets [ ] refer to the thickness required when the flange tip thicknesses are used.

13 ESR-1186 Most Widely Accepted and Trusted Page 13 of 13 TABLE 9 MINIMUM AVERAGE THICKNESS OF FIRE PROTECTION MATERIALS 1, 2, 3, 4 AND 5 APPLIED TO UNPROTECTED ROOF ASSEMBLIES (inches) Assembly: Steel beams or joists supporting insulating concrete roof system 1 a. Metal thickness minimum gage: fluted 24 MSG, vented or nonvented galvanized units with clear spans as required by insulating concrete manufacturer s ICC-ES evaluation report 2. b. Vermiculite concrete, insulation board and wire mesh as required by insulating concrete manufacturer s ICC-ES evaluation report 3. c. Class A, B or C roof covering; Ballasted, adhered or mechanically fastened classified single-ply membrane For fire protection materials: MK-6/HY, MK-6/HY ES, MK-6s, RG, Z-106, Z-106/HY, Z-106/G, Z-146, Z-146T, Z-156, Z-156T Structural Member W/D Ratio 1 HR 2 HR 3 HR W6x16 Beam Full flange tip thickness 0.66 W6x16 Beam Half flange tip thickness / K1 30 ksi > 4 ft. o.c. 4,5 NA 1 1 / / K1 30 ksi 4 ft. o.c. 4,5 NA For SI: 1 inch = 25.4 mm; 1 lb/sq. yd. =0.38 kg/m 2. NA = Nor applicable 1 Insulation and roof covering method of securement must be classified by Underwriters Laboratories Inc. and be recognized in a current ICC- ES evaluation report. Where foam plastic insulation is used, it must be recognized in the roof covering manufacturer s ICC-ES evaluation report. 2 Design stress of the steel deck units must not exceed 75 percent of their allowable bending stress. 3 Insulating concrete manufacturer s specific application instructions, wire mesh requirements, minimum dry density requirements of concrete and insulation board requirements as specified in individual manufacturer's ICC-ES evaluation reports. 4 Use of 1.7 to 3.4 lb./sq. yd. diamond mesh inch expanded steel lath, 3 / 32 to 3 / 16 inch fiberglass scrim fabric, or 20 mil strand 3 / 16 inch plastic net secured to one side of each steel joist is optional. 5 Bridging bars or angles must be protected with the coating material thickness required for a minimum distance of 12 inches beyond the joist. As an alternate to beam thicknesses in Tables 9, thickness for unrestrained beams may be determined on the basis of the following equation: T = Thickness of fireproofing (inches). W = Weight of steel beam (pounds per lineal foot). D = Heated perimeter of steel beam (inches). 1 = Refers to desired beam size and required material thickness. 2 = Refers to W6 16 beam size and appropriate material thickness in table. Limitations: Minimum thickness must not be less than inch. W/D ratios must not be less than 0.37.